کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
641966 1457026 2012 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Recovery of alkyl lactate from ammonium lactate by an advanced precipitation process
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تصفیه و جداسازی
پیش نمایش صفحه اول مقاله
Recovery of alkyl lactate from ammonium lactate by an advanced precipitation process
چکیده انگلیسی

The recovery of lactic acid from ammonium lactate solution is impossible by the conventional acidification process because of the high solubility and lack of precipitation of ammonium sulfate. We found that only the addition of methanol to the solution during acidification of ammonium lactate was very effective in decreasing the solubility of the produced ammonium sulfate. This product could then be separated from the solution by simple filtration. With this advanced acidification process, the lactic acid filtrate was transformed into methyl lactate rapidly by an esterification reaction with methanol even at room temperature. The methyl lactate produced from the fermentation broth of ammonium lactate by this technique could be separated by simple distillation without change in the optical purity of lactic acid. This approach is simple and cost effective because all processes can be carried out at room temperature without complicated equipment. It is also regenerative because the ammonium sulfate byproduct can be utilized for production of sulfuric acid and ammonia.


► We developed an advanced acidification process for lactic acid recovery.
► Addition of methanol was effective in separation of ammonium sulfate precipitate.
► The recovery yield of lactic acid from fermented ammonium lactate was 100%.
► Methyl lactate yield was higher than 80% at room temperature.
► The new process scheme is very efficient and cost effective.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Separation and Purification Technology - Volume 93, 1 June 2012, Pages 25–32
نویسندگان
, , , ,